Process for removing ink and other stains from cloth, paper, &amp;c.



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. UNITED STATES PATENT OFFICE.

ALLERTON S. CUSI-IMAN, OF WASHINGTON, DISTRICT OF COLUMBIA.

PROCESS FOR REMOVING INK AND OTHER STAINS FROM CLOTH, PAPER, 8w.

No Drawing.

To all whom it may concern:

Be it known that I, ALLERTQN SEWARD CUSHMAN, a citizen of the UnitedStates, and residing in the District of Columbla, have invented certainnew and useful Improvements in or Relatin to Processes for Removing Inkand other tains from Cloth, Paper, &c., of which .the following is aspeclfication.

This invention has for its object the removal of ink stains, grassstains, fruit stains. and other stains or 'discolorations from clothing,paper, etc., so that the article will be restored to its originalcondition and value. The process which is the subject of the presentinvention consists essentially in first treating the stain with anoxidizing agent, as for instance a two per cent. solution of otassiumpemmanganate; second, treating t e stain with a reducing agent, such asan eight per cent. solution of oxalic acid; and third, washing out allchemicals with water. The addition of ten per cent. by "olume ofcommercial hydrogen peroxid solution to the eight per cent. oxalicsolution improves its action, but this addition is not essential to theworking of the invention.

In carrying out the process which is the subject of this invention, thearticle of clothing upon which there is an ink, grass 01' other organicstain is first thoroughly wetted with the oxidizing solution and allowedto stand at room temperature for a varying Specification of LettersPatent. Patented Dec, 14, 1920, Application filed August 27, 1920.Serial No. 406,498. v

length of time, usually about ten minutes. At the end of this time theexcess oxidizing solution is drained off, and the reducing solutionadded. This is allowed to stand until all color has disappeared. Thisusually takes from five to fifteen minutes. The chemicals are thenthoroughly washed with water, whereupon the cloth will be found to berestored to its original condition without injury to the fabric in anyway.

Having described my invention and the manner in which it is to beperformed, what I claim is: v

1. A process for removing ink, grass-and other stains by the action of adilute potassium permanganate solution, followed by the application ofan oxalic acid solution, with the addition of hydrogen peroxid,afterward washing with Water, substantially as described.

2. As an article of manufacture, an ink and stain eradicator, consistingof (l) a dilute solution of potassium permanganate and (2) a strongsolution of oxalic acid, with the addition of hydrogen peroxid,substantially as described.

In testimony whereof I have signed my name to this specification in thepresence of two subscribing witnesses.

ALLERTON S. CUSHMAN. lVitnesses: P. H. BUTLER,

PAUL BREDEKAMP.

